Sinnai weather in September

In September, Sinnai sees average daytime highs of 26°C and overnight lows near 19°C, with 26 mm of rain across 4.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 60% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Sinnai's 4th-clearest and 11th-windiest month. For the whole year in context, see Sinnai's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
26 mm
4.1 wet days
Daylight
12 h 18 min
6:10 AM – 6:25 PM
Cloud cover
36%
4th clearest
Wind
12 km/h
11th windiest
Solar energy
5.07 kWh/m²
Travel score
7.9
out of 10

Sinnai is chief town of the homonym municipality.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 25°C by the end.

A typical September day in Sinnai reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32821
42820
52820
62820
72720
82720
92720
102720
112720
122720
132720
142619
152619
162619
172619
182619
192619
202619
212619
222519
232519
242518
252518
262518
272518
282518
292518
302418

Sinnai weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 336.19.54.3
Feb14° / 346.610.54.4
Mar16° / 396.711.75.5
Apr18° / 11°407.3136.4
May22° / 15°275.314.17.7
Jun26° / 18°71.814.78.5
Jul29° / 21°10.314.57.4
Aug30° / 22°61.213.57.0
Sep26° / 19°264.112.37.9
Oct23° / 16°395.4117.7
Nov18° / 13°608.69.86.1
Dec15° / 10°517.99.34.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28614
38515
48416
58317
68218
78119
88020
97921
107822
117822
127822
137624
147624
157525
167525
177525
187525
197426
207426
217327
227327
237327
247327
257327
267327
277327
287327
297327
307327

Chance of precipitation in September

Any precipitation

Sinnai gets around 26 mm of rain over 4.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 13% and peaks near 17% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
17
28
38
49
510
610
711
811
912
1012
1112
1212
1313
1413
1513
1614
1714
1814
1915
2015
2115
2216
2316
2416
2516
2616
2717
2817
2917
3016

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
142232367
242232356
352332356
452432355
552431345
662431344
762531344
872531344
972531344
1082531334
1182530334
1292530333
1392530323
14102530323
15102530313
16112530303
17122531293
18122631283
19132632263
20132632253
21142732243
22142733233
23152833223
24152933212
25152933202
26153034192
27163134182
28163134172
29173233171
30173233161

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:56 AM to 6:23 AM, and sunset from 6:50 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:566:50
212.95:576:48
312.85:586:47
412.85:596:45
512.76:006:43
612.76:016:42
712.66:016:40
812.66:026:39
912.66:036:37
1012.56:046:35
1112.56:056:34
1212.46:066:32
1312.46:076:30
1412.36:086:28
1512.36:096:27
1612.36:106:25
1712.26:116:23
1812.26:126:22
1912.16:136:20
2012.16:146:18
2112.06:156:17
2212.06:166:15
2311.96:176:13
2411.96:186:12
2511.96:196:10
2611.86:196:08
2711.86:206:07
2811.76:216:05
2911.76:226:03
3011.66:236:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.07 kWh/m².

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.51 kWh/m² in July across the year — September's 5.07 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.6Bright
75.5Bright
85.5Bright
95.4Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.7Bright
234.7Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Sinnai?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.9
Sightseeing
2nd-best month of the year
7.7
Beach & pool
4th-best month of the year

September is one of the better times to visit Sinnai for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sinnai in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Sinnai sees daytime highs around 26°C and nights near 19°C. Worth packing: light clothes and sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Sinnai in September

The nearest coast averages about 24°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 8 to Nov 2 — about 4.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep24Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Sinnai in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sinnai peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 16UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar5High
Apr6High
May7High
Jun7Very high
Jul10Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Sinnai?

Sinnai sits at 39.3°N, 9.2°E, 134 m above sea level, in Italy. The nearest listed city is Selargius, 6.0 km away.

Topography around Sinnai

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sinnai.

Within 3 km, the terrain around Sinnai has significant variations in elevation — a maximum elevation change of 401 m around an average of 145 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,061 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,816 m.

The land around Sinnai is covered by grassland (43%) and trees (20%) within 3 km, grassland (27%) and trees (26%) within 16 km, and water (41%) and trees (29%) within 80 km.

3 km
401 m
16 km
1,061 m
80 km
1,816 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Selargius 6.0 km · Monserrato 7.0 km · Quartu Sant'Elena 9.0 km · Sestu 10 km · Cagliari 11 km · Assemini 18 km · Iglesias 57 km · Carbonia 61 km

Italy travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
230 V · 50 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$43,309
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 513
Religion
Christian 81%unaffiliated 13%Muslim 5%other 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sinnai (39.3029°, 9.2028°, elevation 134 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).